<template>
  <div>
    <div id="root">
      <div class="todo-container">
        <div class="todo-wrap">
         
          <Header :addNewTodo="addNewTodo" />
          <List
            :todoList="todoList"
            :singlecheckHandle="singlecheckHandle"
            :singlecheckDeleteHandle="singlecheckDeleteHandle"
          />
          <Footer :todoList="todoList" :checkAllhandle='checkAllhandle' :deleteAll='deleteAll'/>
        </div>
      </div>
    </div>
  </div>
</template>

<script>


import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";
export default {
  name: "App",
  data() {
    return {
      todoList: [],
        
      
    };
  },
  components: {
    Header,
    List,
    Footer,
  },
  methods: {
    //1. 发布事件 修改data的函数
    addNewTodo(newTodo) {
      this.todoList.unshift(newTodo);
    },

    // 2.单个check 修改data的函数
    singlecheckHandle(id) {
      this.todoList = this.todoList.map((item) => {
        return item.id === id ? { ...item, done: !item.done } : item;
      });
    },

    // 3.单个删除 修改data的函数
    singlecheckDeleteHandle(id) {
      
       this.todoList = this.todoList.filter((item) => item.id!==id);
    },
    // 4.全选按钮逻辑
    checkAllhandle(value){
      this.todoList=this.todoList.map((item)=>({...item,done:value})
        
      )
    },

    // 5.清除已完成
    deleteAll(){
      this.todoList=this.todoList.filter((item)=>!item.done)
    }
  },
  mounted() {
    this.todoList=JSON.parse(localStorage.getItem('todoList')||'[]')
  },
  watch:{
    todoList:{
      deep:true,
      handler(){
        localStorage.setItem('todoList',JSON.stringify(this.todoList))
      }
    }
  }
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
